Corn on the Cob

Well, this will help me because I can never remember how long to boil the corn for…and always have to find directions somewhere. I am interested in the fact that she says to pour boiling water on the corn in the kettle, not just drop the ears in boiling water. Does it make a difference?
Choose the freshest corn possible. To test freshness and tenderness of corn, break a kernel with your fingernail. If the milk spurs out, the ear is young tender and at least fairly fresh. Corn is best when cooked immediately after picking. Husk the corn and remove the silks. Have plenty of boiling water ready. Put the ears of corn into a kettle and pour on enough boiling water to cover. Boil 4 to 6 minutes, depending on age and tenderness of ears. Drain thoroughly and serve immediately with salt and plenty of butter. The Modern Family Cookbook